# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from mcp-security.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Performs live DNS resolution (IPv4/IPv6), TLS certificate inspection (issuer, expiry), and HTTP security headers grading for a given domain.

## Facts

- Endpoint: GET https://mcp-security.agentdiet.dev/v1/dns-whois-tls-recon?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: mcp-security.agentdiet.dev
- Website: https://mcp-security.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mcp-security-agentdiet-dev-domain-osint-tls-certificate-security-c627099f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7XSo5XBgTGgBh7NkmFvAc

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability mcp-security-agentdiet-dev-domain-osint-tls-certificate-security-c627099f
```

Example prompt: Can you run a full domain OSINT recon on anthropic.com — check its DNS records (IPv4 and IPv6), TLS certificate issuer and expiry, and HTTP security headers grade?

## When to prefer this

Choose this endpoint when you need a quick, all-in-one domain security snapshot covering DNS, TLS, and HTTP headers without setting up your own toolchain. It is ideal for OSINT investigations, pre-engagement recon, vendor security assessments, or monitoring certificate expiry — especially when you need structured, agent-consumable output rather than running dig, openssl, and curl manually.

## Known failure modes

- Domain does not exist or fails to resolve — returns DNS resolution error
- Domain has no TLS certificate (HTTP-only) — TLS fields may be null or empty
- Domain blocks external probes or rate-limits reconnaissance — incomplete data returned
- Invalid domain format provided — returns validation error
- Network timeout reaching the target domain — partial or error response

## How this service works

Inspects live IPv4/IPv6 DNS resolution, TLS certificate issuer/expiry, and HTTP security grade. (Live x402 v2, IETF MPP & MCP endpoint at https://mcp-security.agentdiet.dev/v1/dns-whois-tls-recon)

## Output

Returns live DNS resolution data including IPv4 and IPv6 addresses, TLS certificate details such as issuer and expiry date, and an HTTP security headers assessment including presence of headers like HSTS, CSP, X-Frame-Options, and an overall security grade for the target domain.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "domain"
 ],
 "properties": {
  "domain": {
   "type": "string",
   "minLength": 1,
   "description": "Target domain name (e.g. anthropic.com, openai.com) for DNS, TLS certificate, and security header OSINT"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mcp-security-agentdiet-dev-domain-osint-tls-certificate-security-c627099f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-security.agentdiet.dev](https://www.zero.xyz/host/mcp-security.agentdiet.dev/llms.txt)